Coleshill, any hour sunrise to sunset, 1997–2017
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Met Office station 19187: Coleshill, Warwickshire  (B46 3); OS grid reference: SP 210869.
Coordinates:  N52°28'48" W1°41'20"  (52.480 -1.689), elevation 96 m.
Note: gusts not recorded in 13 out of the 21 years, 5.0% of daylight visibility records missing, 5.1% of daylight precipitation records missing, 4.9% of daylight wind records missing.

This is the analysis for the average of 21 years  (1997–2017).
Time slot: sunrise to sunset  (any daylight hour); click below on the start time for a specific 2-hour slot, or on all-day for whole day analysis (all times are GMT):

any-hour  06:00  08:00  10:00  12:00  14:00  16:00  18:00  all-day

‘Flyable days’ analysis

This is the number of days in each month, on average, for which (in some daylight hour) the visibility was adequate, and there was no bad weather, and the wind speed was less than or equal to that shown on the left.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Hours
≤ 5 mph 8 9 12 14 16 19 21 20 17 13 11 10  170  47%  682  14%
≤ 10 mph 19 19 22 24 27 27 29 28 26 25 22 20  288  79%  1995  41%
≤ 15 mph 24 24 27 27 28 27 29 29 28 28 26 26  324  89%  2838  58%
≤ 20 mph 26 25 28 28 28 27 29 29 28 29 27 27  330  90%  2977  61%
≤ 30 mph 26 25 28 28 28 27 29 29 28 29 28 27  332  91%  3051  62%
≤ 40 mph 26 25 28 28 28 27 29 29 28 29 28 27  333  91%  3068  63%
any wind 26 25 28 28 28 27 29 29 28 29 28 27  333  91%  3069  63%
‘Total’ shows the total flyable days, on average, in a year, and the same as a percentage.
‘Hours’ shows the total flyable hours, on average, in a year, and the same as a percentage of total daylight hours.

Trend analysis

This is the average change (per year, over the 21 years) in the average number of days in each month for which (in some daylight hour) the visibility was adequate, and there was no bad weather, and the wind speed was less than or equal to that shown on the left.

For example, if a value of +0.5 is shown for a given month then that implies that since 1997 the number of flyable days in that month has increased by (on average) half a day per year.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
≤ 5 mph +0.2 +0.2 +0.3 +0.5 +0.2 +0.1 +0.4 +0.1 +0.5 +0.2     +2.8
≤ 10 mph +0.5 +0.5 +0.3 +0.5 +0.3 +0.2 +0.5 +0.4 +0.5 +0.3 +0.1 +0.1 +4.2
≤ 15 mph +0.4 +0.4 +0.4 +0.4 +0.3 +0.1 +0.4 +0.4 +0.4 +0.3   +0.1 +3.7
≤ 20 mph +0.3 +0.4 +0.4 +0.4 +0.4 +0.1 +0.4 +0.4 +0.4 +0.3   +0.1 +3.5
≤ 30 mph +0.4 +0.4 +0.4 +0.4 +0.4 +0.2 +0.4 +0.4 +0.4 +0.3   +0.1 +3.7
≤ 40 mph +0.4 +0.4 +0.4 +0.4 +0.4 +0.2 +0.4 +0.4 +0.4 +0.3   +0.1 +3.8
any wind +0.4 +0.4 +0.4 +0.4 +0.4 +0.2 +0.4 +0.4 +0.4 +0.3   +0.1 +3.8
Empty cells indicate negligible change; ‘Total’ shows the sum of the trends over the whole year.

Visibility analysis

This is the number of days in each month, on average, for which (in some daylight hour) the visibility was adequate. That is, for the entire hour:
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Good days 28 26 28 28 29 28 29 30 28 29 29 29  341  93%

Bad weather analysis

This is the number of days in each month, on average, for which (in some daylight hour) no bad weather occurred. That is, for the entire hour, there was no rain, hail, snow, snow on the ground, icing conditions, thunderstorms, etc.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Good days 29 27 31 30 31 30 31 31 30 31 29 29  358  98%

Wind speed analysis

This is the number of days in each month, on average, for which (in some daylight hour) the maximum (gust) wind speed was less than or equal to the value shown on the left.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
≤ 5 mph 8 9 12 14 16 19 21 20 17 13 11 10  170  47%
≤ 10 mph 19 19 22 24 27 27 29 28 26 25 22 20  288  79%
≤ 15 mph 24 24 27 27 28 27 29 29 28 28 26 26  324  89%
≤ 20 mph 26 25 28 28 28 27 29 29 28 29 27 27  330  90%
≤ 30 mph 26 25 28 28 28 27 29 29 28 29 28 27  332  91%
≤ 40 mph 26 25 28 28 28 27 29 29 28 29 28 27  333  91%

Please send any comments, questions, or corrections to me, Mike Cowlishaw, at mfc@speleotrove.com.

All text Copyright © Mike Cowlishaw 2008, 2018. All rights reserved. The pages and data here are for non-commercial use only.
This page was last edited on 2018-02-09.